Two different hook form alter

php hook form alter

//example one 
//using a session key profile to hide elements when credentials are already given from a different login account
 
function vod_oauth_medscape_user_insert(&$edit, $account, $category) {
    // load frontend functions
    module_load_include('inc', 'vod_oauth_medscape', 'vod_oauth_medscape.frontend');

    // create authmap
    $profile = vod_oauth_medscape_SESSION_GET(VOD_AUTH_MEDSCAPE_SESSION_KEY_PROFILE);
    if ($profile) {
        vod_oauth_medscape_update_authmap($profile->guid, $account->uid);
    }
}   function vod_oauth_medscape_form_user_register_form_alter(&$form, &$form_state, $form_id)
{
  module_load_include('inc', 'vod_oauth_medscape', 'vod_oauth_medscape.frontend');

  // zip code is optional and only applicable when $profile is available, in which case we have a value
  // hide always on register; medscape or not
  $form['field_zip_code']['#attributes']['style'] = array('display:none;');

  // if oauth profile exists, use it
  $profile = vod_oauth_medscape_SESSION_GET(VOD_AUTH_MEDSCAPE_SESSION_KEY_PROFILE);
  if ($profile)
  {
    // set default values, and hide fields. Can't simply change field type to 'hidden' .. drupal no likey
    $form['field_first_name']['und'][0]['value']['#default_value'] = $profile->fn;
    $form['field_first_name']['#attributes']['style'] = array('display:none;');
    $form['field_last_name']['und'][0]['value']['#default_value'] = $profile->ln;
    $form['field_last_name']['#attributes']['style'] = array('display:none;');
    $form['field_zip_code']['und'][0]['value']['#default_value'] = $profile->zc;

    // remove fields from form
    $form['field_therapeutic_areas']['#access'] = FALSE;
    $form['field_specialities']['#access'] = FALSE;
    $form['field_npi_number']['#access'] = FALSE;
    $form['field_state']['#access'] = FALSE;
    $form['field_grants']['#access'] = FALSE;
  }
  //show for all user reg forms
  $form['terms_of_use'] = array(
    '#type' => 'item',
    '#markup' => '<div class="term">By submitting this form, you acknowledge that you have read, understand, and agree to the ConneXion360 <a href="/terms-of-use">Terms of Use</a> and <a href="/privacy-policy">Privacy Policy.</a> </div>',
    '#weight' => 10,
  );
}


//example two changing search variables
  function diabetes30_form_alter(&$form, &$form_state, $form_id)
  {
      if ($form_id == 'search_block_form')
      {
          $form['search_block_form']['#title'] = t('Search'); // Change the text on the label element
          $form['search_block_form']['#title_display'] = 'invisible'; // Toggle label visibilty
          $form['search_block_form']['#size'] = 30;  // define size of the textfield
          $form['search_block_form']['#default_value'] = t('Search'); // Set a default value for the textfield
          $form['actions']['submit']['#value'] = t(''); // Change the text on the submit button
          $form['actions']['submit'] = array('#type' => 'image_button', '#src' => base_path() . path_to_theme() . '/images/btn-search.png');
  
          // Add extra attributes to the text box
          $form['search_block_form']['#attributes']['onblur'] = "if (this.value == '') {this.value = 'Search';}";
          $form['search_block_form']['#attributes']['onfocus'] = "if (this.value == 'Search') {this.value = '';}";
          // Prevent user from searching the default text
          $form['#attributes']['onsubmit'] = "if(this.search_block_form.value=='Search'){ alert('Please enter a search'); return false; }";
  
          // Alternative (HTML5) placeholder attribute instead of using the javascript
          $form['search_block_form']['#attributes']['placeholder'] = t('Search');
      }